ASTM F681-82(2008)

Standard Practice for Use of Branch Connections

ABSTRACT
This practice lists commonly used types of branch connections for carbon steel, chromium-molybdenum steel pipe and copper-nickel alloy tubing. The branch to run size applications are presented in details. The weld joint designs, fabricated branch connections and threaded fittings shall meet the requirements prescribed.
SCOPE
1.1 This practice lists commonly used types of branch connections for carbon steel, chromium-molybdenum steel pipe and copper-nickel alloy tubing. Branch to run size applications are given in Table 1, Table 2, and Table 3. Other types of branch connections (Fig. 1) may be used provided they comply with the requirements of Title 46 CFR Subparts 56.07-10(f) and 56.70-15(g) of the USCG Regulations.  
TABLE 1 Branch Connection Matrix for Carbon Steel Piping
LEGEND (see Fig. 1)
    1 = Tee or lateral (butt weld) 2 = Tee or lateral (socket weld or threaded) 3 = Welded outlet (butt weld end) 4 = Welded outlet (socket weld or threaded end) 5 = Fabricated joint (cut-in branch)
TABLE 2 Branch Connection Matrix for Chrome Moly Piping
LEGEND (see Fig. 1)
    1 = Tee or lateral (butt weld) 2 = Tee or lateral (socket weld) 3 = Welded outlet (butt weld end) 4 = Welded outlet (socket weld end) 5 = Fabricated joint (cut-in branch)
TABLE 3 Branch Connection Matrix for Copper Nickel Piping
LEGEND (see Fig. 1)
    1 = Tee or lateral (butt weld) 2 = Tee or lateral (silver brazed) 3 = Welded outlet (butt weld end) 4 = Welded outlet (silver brazed end) 5 = Fabricated joint (cut-in branch) 6 = Silver brazed outlet (silver brazed end)
FIG. 1 Illustrative Legend for Branch Connections

General Information

• Status: Historical
• Publication Date: 31-Oct-2008
• ICS: 47.020.60 - Electrical equipment of ships and of marine structures
• Technical Committee: F25 - Ships and Marine Technology
• Drafting Committee: F25.11 - Machinery and Piping Systems

Relations

• Replaces: ASTM F681-82(2004) - Standard Practice for Use of Branch Connections
• Effective Date: 01-Nov-2008
• Replaced By: ASTM F681-82(2014) - Standard Practice for Use of Branch Connections
• Effective Date: 01-Aug-2014

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: F681 − 82(Reapproved 2008) An American National Standard
Standard Practice for
Use of Branch Connections
ThisstandardisissuedunderthefixeddesignationF681;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope 2.2 ANSI Standard:
B31.1 Power Piping
1.1 This practice lists commonly used types of branch
2.3 Other Document:
connections for carbon steel, chromium-molybdenum steel
pipe and copper-nickel alloy tubing. Branch to run size Title 46 Code of Federal Regulations (CFR) Shipping, Parts
41 to 69
applications are given in Table 1, Table 2, and Table 3. Other
typesofbranchconnections(Fig.1)maybeusedprovidedthey
3. General Requirements
comply with the requirements of Title 46 CFR Subparts
56.07-10(f) and 56.70-15(g) of the USCG Regulations.
3.1 Weld joint designs shall be in accordance with Specifi-
cation F722 and the limitations therein.
2. Referenced Documents
2 3.2 Fabricated branch connections shall meet the reinforce-
2.1 ASTM Standards:
mentrequirementsofSection104.3ofANSIB31.1asmodified
F722 Specification for Welded Joints for Shipboard Piping
by Title 46, CFR Subparts 56.07-10(f) and 56.70-15(g) of the
Systems
USCG regulations.
3.3 Threaded fittings shall be subject to the limitations of
This practice is under the jurisdiction of ASTM Committee F25 on Ships and
Title 46 CFR, Subpart 56.30-20 of the USCG Regulations.
Marine Technology and is the direct responsibility of Subcommittee F25.11 on
Machinery and Piping Systems.
Current edition approved Nov. 1, 2008. Published December 2008. Originally
approved in 1980. Last previous edition approved in 2004 as F681 – 82 (2004).
DOI: 10.1520/F0681-82R08. Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
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